Cutting mechanism



Oct'. 4,1927.

F. M. HARGRAVE l CUTTING MEGHANISM Original Filed Sept. l5. 1925' 5Sheets-sheet;

v MgY/QINVENTOR.

y ATTORNEY.

F. M. HARGRAVE CUTTNG MECHANISM a Original Filedsept. 15. 1925 5Sheets-Sheet 2 E /YffWQm/ENTOR.

v BY

Oct. 4, 1927.

F: M. HARGRAVE CUTTING MEGHANI SM Original Fil ed Sept. l5. 1925v 5Sheetswsheet 3 Patented Oct. 4, 1927.

cU'rriNe MiioHANisi/L.

Original application filed September I5, 192.5, Serial No. 56i508'.Divided and this application lefd January 25, 1927.

-This invention relates to n road Vbuilding machines, more particularlyto the cutting mechanism thereof, and Aisa division' of my Vapplicationfiled September l5, 1925, Serial No. 56,508, and theinvention has forits object to provide, in a manner as hereinafter set forth, a new andnovel mechanism for cutting or tearing up the upper layer ofthe surfaceof a street, roadway or pavement;

Further objects ofV the invention are to provide, in a manner ashereinafter set forth, `a mechanism for the purpose set forth which iscomparatively. simple in its construction and arrangement, st-rong,durable, thoroughly efhcient in its use, conveniently adjusted andcomparatively.inexpensive to set up.

l/Vit-h the foregoing and other objects; in view, the invention consistsof the novel construction, combination and arrangement of parts .ashereinafter more specificallyl described, and illustrated in theaccompanying drawings wherein is shown an embodiment o fa mechanism forthe purpose referred to,

but it is to be understood that changes, variations and modificationscan be resorted' to which fall within the scope of the claims hereuntoztppendedv l In the drawings wherein like reference A characters denotecorresponding parts throughout the several views:

Figure l is a top plan view' of a mechanism, in accordance with thisinvention, for cutting or tearing up the upper layer of the surface of astreet, roadway or pavement and v further illustrating the adaptationthereof lin connection with a mobile support, the latter being brokenaway. i

Figure 2 is a side elevation of the cutting mechanism showing theladaptation thereof in connection with a mobile support, the latterbeing broken away,

y Figure 3 is a section on line 8-3 Figure l.

Figure 4L is a section on line 4.-4 Figure 3.

Figure 5 is a side elevation of one of the cleaners of scrapers.

Figure 6 is a fragmentary view, in plan of one of the suspension rodsfor the support for the cleaners or scrapers. i

A cutting mechanismin accordance with this invention, is adapted to becarriedby a mobile supportand such support can include wheels andrunners, and can be of a type as disclosed in my application Serial No.56,508.

e The mobile support may be self-propelledior operated as a trailerbehind a tractor, truck sei-iai No'. 163,495.y

the sides of the mobile support' and thesaid 6o sides are generallyreferred to by the reference charactersl and 2, As the mobilesupport,forms no part of thisl inventionv other than the side members l, 2thereof, said support is not shown'or specifically referr'ed'fto,v 65

as full reference toa mobilesupport is had in my application Serial No;56,508.` Each side of the mobile'supportl will be hereinafter referredto as a side member.

Before specifically describing the elements I0 of the cutting mechanism,it isthought` advisable to briefly describethe function an'd arrangementthereof; The cutting mechaanism comprises two batteries of cuttingdisks, o'nebattery immediately behind; the 75 other. Each battery is-'somountedy that'its passage, when held in contact with the pavement orroadway surface under treatment,

vwill cut or tear up vthe upper layer of* such surface. Thedisks of eachbattery are'fnee 80 to revolve about'their common axis, and each disk isprovided with a separate cleaning? or scraping knife for the purpose offreeing the cutting edge' or inside facev of each disk from bituminousor other material which might 85 adhere thereto. The disksaresharpened'ad of concave shape. The concave surface of the'disks in thefrontbattery face tothe right, while the concave side of the disk inIthe second or rear battery face'in an opposite'di- 90 The purposeandveffect of thislr'erection. versal of thev surface is to equalize lateralpressure and eliminateside thrust, the tendency being to straighten thepath of'themachine and not thrust it to one side or the other as wouldbethe' case with the disks faced in one direction; `Each batteryofdisk's is independently adj ustablefrom a 'verticalstandpoint and eachbattery can be'operated alone or both may be operated together. Thefront-100 battery may beset to penetratel tooneV depth while the rearbattery may be set at a greater depth. The rear battery is so placedin'position that the disks thereof operatev on lines half way betweenthe two'disks immediately; 105

in front and forming a part of the frontibattery, thereby insuring'thatAthe `entire" surface of the pavementV or roadway will be processed. Theconstructionof" one 'battery of disks, is the same as the other battery,with H0 `transversely and forwardly at an and an outer part 240 arrangedat an angle j are connected rearwardly at an this exception that theconcave disks of the forward battery referred to generally by thereference character 37 are oppositely disposed with respect to theconcave disks of the rear battery referred to generally by the referencecharacterv 238. A further difference isa-that. the front battery 237extends in an opposite inclined plane with respectt-o the position inwhich the rear battery 238 is arranged, or in other words the batteriesextend in opposite inclined planes with respect to each other. The frontbattery 237 extends inclination with respect to the machine, and the,rea-r battery 238 extends transversely and inclination with respecttothe machine. The construction of both batteries is identical, therebythe description of one will apply to the other.

Each battery consists of a series of opposed concave cutting disks 239of the desired diameter, and with the convex face of one disk opposingythe concave face of the other throughout. The disks 239, are revolublymounted on shaft 240, and maintained equidistant with'respect to eachother by the spacing Each end ofthe shaft 240 extends into a combinedbearing and elevating block therefor, and which comprises an inner part242 with respect to the inner part 242. The outer part 243 is formed oftwo sections, secured together by holdfast devices 244, `and providedwith a socket 245 for the reception of the shaft 240. The outer part243, of 'each of said elevating blocks, has secured thereto by holdfastdevices 244, an up-standing bracket member 246 which projects above thedisks 239, as well as projects rearwardly thereto. The bracket members246 together at the rear of their upper portion, by a polygonal-shapedsusffpension bar 247, upon which is seated a series of backwardly orforwardly extend- 111gv and downwardly inclined cleaner or scraperelements 248, which engage the concave faces of the disks 239. Each ofthe cleaner elements at its rear end is provided With a head 249, formedat its bottom with `a V-shaped notch 250 for seating on the bar'247. Theblade of each of said cleaner elements Ais indicated at 251, and isdisposed at an inward inclination with respect to the head 249. Theforward end of the blade 251 is tapered, as at 252, and formed f with acutting edge 253. Mounted on the top of the head 249 and extending uponthe top edge of the blade 251, at the rear thereof, is a flangedcoupling plate 254. Ex-

f tending upwardly through the head 249, as

i 255 of a clamping yoke 256.

Well as through the plate 254, are the arms The lower ,portionv of theyoke 256, as indicated at 257, conforms in contour to the lower portionof collars 241 carried by the shaft 240.

Vthe bar 247. Securing nuts 258 are mounted on the upper endsof the arms255, and in connection with the yoke 256 and coupling member 254,fixedly clamp the cleaning element 248 in position, as shown in Figures5 and 6, to the suspension bar 247, and by this arrangement the cleaningelement 248 operating against the concave facev of a disk 239 will cleanthe same. The cleaning elements 248 are stationary and the disks 239revolve'against the forward end of the cleaning elements.

The inner part 242, of the combined bearing and elevating blocks for theshaft 240, is formed with a vertically disposed opening 259 having thewall thereof threaded throughout, and engaging with said threaded wall,is an adjusting'element for vertically moving the battery of disks fromactive position or for adjusting the depth of cut. As each adjustingelement is of the same construction, but one will be described, as thedescription of one will apply to the other. Each adjusting element visformed of a vertically disposed shaft, referred to generally by thereference character 260, and which comprises a plane lower terminalportion 260, an intermediate threaded portion 261 which engages with thewall of the opening 259, and a plane upper terminal portion 262,provided at its lower terminus with a stop collar or boss 263. The lowerterminal portion 260, is mounted in a socket 264, formed in a supportingblock 265, secured by holdfast devices 266, to thevlower portion of theinner face of' a side member of the mobile support. The upper terminalportion 262 of the shaft 260, extends through an opening 267, formed ina bearing block 268, which is fixedly secured to a Vspaced pair of anglepieces 269 attached to and projecting above the top of a side member ofthe mobile support.

The shaft 268 has connected thereto a beveled pinion 270, and said shaft260 is provided with a stem 271 for the reception of the hand wheel 272for the purpose of operating the shaft when occasion requires.

The two shafts 261 of each battery, are simultaneously operated, wherebythe two combined' bearing and elevating blocks of each battery will beadjusted vertically simultaneously, and for this purpose the shaft 260which is manually operated, is connected by transmission mechanism tothe other shaft 260 to provide for the simultaneous operation of bothshafts. The said transmission mechanism includes a beveled gear 279 atthe upper end of each shaft 260, and further includes a counter shaft 273 provided with a beveled pinion 274. Two counter yshafts 273 areemployed, and the beveled pinions 274 thereof mesh with the beveledpinions 270 on the two shafts 260 of the battery. Each shaft 273 extendsat an inclination through a bearing275, carriedby a lsupport 276, fixedto a side ofthe section 2.

sprocket pinion 277. rIlhe pinions 277 are 'connected by an endlesschain 278 of the link type. By this arrangement the bodily adjusting vofa battery, vertically and simultaneously from each end can' beaccomplished. I

It is thought that the many advantagesof a cutting mechanism, inaccordance withthis invention for employment in road building machinescan be readily understood and although the preferred embodiment of theinvention is as illustrated and described, yet it is to be understoodthat changes in the details of construction can be had which will fallwithin the scope of the invention as claimed.

vVhat I claim is:

l. In a road building machine a mobile supporting structure, two sets ofrevoluble surface cutting disks arranged within and extendingtransversely of said structure, one set of disks inclining forwardly andthe other set rearwardly with respect to said structure, a pair ofsupports, each common to a set of disks, means for connecting thesupports to said structure, and each of the disks of each of said setsbeing concave.

2. In a road building machine a mobile supporting structure, two sets ofrevoluble surface cutting disks arranged within and extendingtransversely of said structure, one set of disks inclining forwardly andthe other set rearwardly with respect to said structure, a pair ofsupports, eac-h common to a set of disks, an adjusting` mechanism forvertically shifting each support, said adjusting mechanisms carried bythe supports and said structure and further providing means for couplingthe supports to said structure.

3. In a road building machine a mobile supporting structure, two sets ofrevoluble surface cutting disks arranged within and extendingtransversely of said structure, one set of disks inclining forwardly andthe other set rearwardly with respect to said structure, a pair ofsupports, each common to a set of disks, an adjusting mechanism forvertically shifting each support, said adjusting mechanisms carried bythe supports and said structure and further providing means for couplingthe supports to said structure, and each of the disks of each of saidsets being concave.

4. In a road building machine a mobile' supporting structure, two setsof revoluble surface cutting disks arranged within and extendingtransversely of said structure, one set of disks inclining forwardly andthe other set rearwardly with respect to said structure, a pair ofsupports. each connnon The shafts 273 project forwardly from theirvbearings and each is provided with to as'et'of disks." meansforconnecting the supports'to'said structure, a pair of bars each arrangedrearwardly of and having its `ends connected to a su port, a set of`spaced'cleaner elements carried by each bar, each of the elements ofeach set projecting yforimrdly kfrom a bar and extending downwardly atan inclination and further inwardvly at an inclination towardsy one sideof a disk and associatedwith the latter.

5. In a road building machinev amobile supporting structure, two sets ofrevoluble Ysurface cutting` disks arranged within and extendingtransversely of said structure,.one

other' setiearwardly with respect to said structure, a pair of supports,each common to a set of disks, means for connecting the supports to saidstructure` each of the disks of each of said sets being concave, a pairof bars each arranged rearwardly of and connected to a supporta set ofcleaner elements carried by each bar, each of the elements of each setprojecting lforwardly from a bar at a downward inclination and furtherinclining inwardly towards one side of a disk and associated therewith.

G. In a road building `machine a mobile supporting structure, two setsof revoluble surface cutting disks arranged within and extendingtransversely of said structure, one set of disks inclining forwardly andthe other set rearwardly Ywith respect to said. structure, a pair ofsupports, each common to a set of disks, an adjusting mechanism forvertically shifting each support, said adjusting mechanisms carried bythe supports and said struct-ure and further providing means forcoupling the supports to said structure, a pair 'of bars each arrangedrearwardly of and above the supports and further connected to thelatter, a set of spaced cleaner elements carried by each bar, each ofthe elements of each set projecting forwardly at a downwardlyinclination and further inclining towards one side of a Idisk andassociated therewith.

7. In a road building machine a mobile supporting structure, two sets ofrevoluble surface cutting disks arranged within andextendingtransversely of said structure, one set of disks inclining forwardly andthe other set rearwardly with respect to said structure, a pair ofsupports. each common to a set of disks, an adjusting mechanism forvertically shifting each support, said adjusting mechanism carried bythe supports and said structure and further providing means for couplingthe supports to said structure, each of the disks of each of said setsbeing concave, a pair of bars each arranged above and rearwardly of asupport and further connected with the latter, and a set of spacedcleaner elements carried by each bar, each of the elements of each setprojecting forwardly at a downward inclination and further extendinginwardly towards one side of a disk and associated therewith.

8. In a road building machine mobile supporting structure, a pair ofsurface cutting mechanisms arranged in spaced relation andpositionedwithin said structure trans-W versely thereof, one of said mechanismsarranged in advance of the other, and one of said mechanisms extendingforwardly at an inclination and the other rearwardly at an inclinationwith respect to said structure.

9. In a road building machine a mobile supportingstructure, a pair ofsurface cutting mechanisms arranged in spaced relation and positionedwithin said structure trans- Versely thereof, one of saidv mechanismsarranged in advance of the other, one of said mechanisms extendingforwardly at an inclination and the other rearwardly at an inchnationwith respect to said structure, and means carried by each of saidmechanisms and said structure for vertically adjusting said mechanismsindependently with respect to said structure.

l0. In a road building machine in accordance with claim 1, alternatelydisposing the disks of one set with respect to ythe disks of the otherset.

In testimony whereof, I hereto.

FRED MERRILL IIARGRAVE.

affix my signatnre 30

